P | Bats/Throws: R/R | 6' 2" 210 lbs | Age: 27
Draft: 2017 | Rd. 6, No. 178, Pittsburgh Pirates | Tracy (CA) HS
W L ERA G GS SV IP SO WHIP
2023 1 0 6.33 16 0 0 21.1 22 2.11
2024 0 0 4.34 17 0 0 18.2 17 1.45
2025 0 0 13.50 1 0 0 2 1 2.00
3 Seasons 1 0 5.79 34 0 0 42 40 1.81
G W-L ERA IP SO WHIP
2023 16 1-0 6.33 21.1 22 2.11
2024 17 0-0 4.34 18.2 17 1.45
2025 1 0-0 13.50 2 1 2.00
3 Seasons 34 1-0 5.79 42 40 1.81
MLB Percentile Rankings
Movement Profile (Induced Break)
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Statcast Statistics

Season Age Pitches Batted
Balls
Barrels Barrel % Barrel/PA Exit
Velocity
Max EV Launch
Angle
LA Sweet-
Spot %
XBA XSLG WOBA XWOBA XWOBACON HardHit% K% BB% ERA xERA
2023 25 455 69 7 10.1 6.5 92.6 111.1 8.8 42.0 .301 .491 .414 .391 .447 43.5 20.6 14.0 6.33 6.90
2024 26 312 57 4 7.0 4.8 87.0 113.4 15.1 33.3 .232 .376 .330 .306 .337 35.1 20.5 10.8 4.34 3.91
2025 27 40 9 1 11.1 10.0 91.3 107.2 12.7 33.3 .369 .512 .390 .381 .423 44.4 10.0 0.0 13.50 6.44
Player 807 135 12 8.9 6.0 90.1 113.4 11.8 37.8 .276 .443 .378 .355 .398 40.0 20.0 12.0
MLB 7.2 4.9 88.6 122.9 12.4 33.3 .245 .404 .315 .315 .368 37.0 22.2 8.4
! Note: All figures in this table cover the period 2015-present.

Statcast Pitch Arsenal

Bolton relies on 4 pitches.
Sinker
(42.5%) ,
Sweeper
(37.5%) ,
Four Seamer
(12.5%) ,
Cutter
(7.5%) ,


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Pitch Tracking



Batted Ball Profile

AIR: Fly Balls + Line Drives + Popups All Batted Balls Batted Ball Breakdown
Season GB % AIR % FB % LD % PU % Pull % Straight % Oppo % Pull GB % Straight GB % Oppo GB % Pull AIR % Straight AIR % Oppo AIR %
2023 39.1 60.9 21.7 37.7 1.4 40.6 39.1 20.3 18.8 11.6 8.7 21.7 27.5 11.6
2024 42.1 57.9 21.1 21.1 15.8 36.8 35.1 28.1 12.3 19.3 10.5 24.6 15.8 17.5
2025 33.3 66.7 11.1 44.4 11.1 22.2 44.4 33.3 11.1 11.1 11.1 11.1 33.3 22.2
Player 40.0 60.0 20.7 31.1 8.1 37.8 37.8 24.4 15.6 14.8 9.6 22.2 23.0 14.8
MLB 44.2 55.8 24.0 24.7 7.1 37.4 37.4 25.1 20.6 17.6 5.9 16.7 19.7 19.3
! Note: All figures in this table cover the period 2015-present.

Quality of Contact

Season Weak % Topped % Under % Flare/Burner % Solid % Barrel % Barrel/PA
2023 2.9 29.0 14.5 36.2 5.8 10.1 6.5
2024 3.5 33.3 29.8 19.3 7.0 7.0 4.8
2025 0.0 22.2 33.3 33.3 0.0 11.1 10.0
Player 3.0 30.4 22.2 28.9 5.9 8.9 6.0
MLB 4.0 32.4 24.9 24.4 5.9 7.2 4.9
! Note: All figures in this table cover the period 2015-present.

Pitch Movement


How this works: This section shows two different ways to evaluate pitch movement. On the left, “Total Movement” shows the real-world movement of a pitch, including the forces of gravity, which affects every pitch thrown. Since gravity requires time, and slower pitches aren't 'better' just because they have more time to move, a pitch's movement is compared to other pitches of the same pitch type, within +/- 2 MPH and +/- 0.5 feet of extension/release. On the right, Induced Movement (or IVB) is reported without gravity, and attempts to isolate movement created by the pitcher's ability to spin and manipulate the ball.
Total Movement (in inches, w/ gravity)Induced Movement (in inches, w/o gravity)
YearPitchTeamHand#MPHVertical
Drop
vs.
Comparable
Horizontal
Break
vs.
Comparable
Vertical
Break
vs. AvgHorizontal
Break
vs. Avg
2025 Sinker CLE R 17 93.9 22.0 -1.2 14.4ARM -1.0 9.1 -1.7 14.4ARM -0.7
2025 4-Seam Fastball CLE R 5 94.3 17.0 -1.9 7.6ARM -0.1 13.7 -2.1 7.6ARM 0.0
2025 Cutter CLE R 3 88.9 34.9 -8.4 7.0GLV 4.9 -0.4 -8.7 7.0GLV 4.8
2025 Sweeper CLE R 15 82.9 37.9 -1.3 14.2GLV 0.5 2.0 -0.9 14.2GLV 0.3
2024 Changeup SEA R 37 91.5 33.7 4.1 14.6ARM -0.9 -1.0 5.9 14.6ARM 0.4
2024 4-Seam Fastball SEA R 12 94.8 18.3 -3.3 3.6ARM -4.3 12.2 -3.5 3.6ARM -4.0
2024 Sweeper SEA R 77 83.7 35.6 -2.3 13.5GLV -0.2 3.5 -2.0 13.5GLV -0.6
2024 Cutter SEA R 98 89.1 32.0 -5.6 6.1GLV 4.0 2.3 -6.0 6.1GLV 3.4
2024 Sinker SEA R 88 94.7 24.8 1.4 14.5ARM -1.1 5.9 1.3 14.5ARM -0.4
! Note: Years are in reverse order.

Run Values by Pitch Type

Year Pitch Type Team RV/100 Run Value Pitches % PA BA SLG wOBA Whiff% K% PutAway % xBA xSLG xwOBA Hard Hit %
2025 Sinker -1.3 0 17 42.5 2 .500 .500 .450 0.0 0.0 0.0 .397 .432 .365 50.0
2025 Sweeper -2.3 0 15 37.5 5 .400 .600 .430 20.0 20.0 12.5 .330 .558 .378 50.0
2025 4-Seam Fastball -9.3 0 5 12.5 2 .500 .500 .450 0.0 0.0 -- .597 .704 .569 50.0
2025 Cutter 9.5 0 3 7.5 1 .000 .000 .000 0.0 0.0 -- .054 .058 .049 0.0
2024 Cutter -0.2 0 98 31.4 27 .259 .296 .280 32.6 22.2 24.0 .204 .230 .191 23.8
2024 Sinker -1.3 -1 88 28.2 21 .250 .625 .440 22.9 23.8 26.3 .272 .531 .424 45.5
2024 Sweeper -0.5 0 77 24.7 20 .158 .526 .298 23.5 20.0 16.0 .144 .359 .234 40.0
2024 Changeup -1.8 -1 37 11.9 11 .333 .333 .309 14.3 9.1 8.3 .407 .492 .403 33.3
2024 4-Seam Fastball -7.2 -1 12 3.8 4 .500 .500 .575 14.3 25.0 14.3 .357 .736 .578 100.0
! Note: Years are in reverse order.
! Note: To better align with other values, positive numbers (red) are good, and negative numbers (blue) are poor.

Spin Direction

Year Pitch Type Pitches MPH Active Spin % Total Movement (In.) Spin-Based Observed Deviation
2025 Sinker 16 94.0 75 17.1 1:00 2:00 -60
2025 Sweeper 15 82.9 60 15.0 8:15 9:00 -45
2024 Changeup 32 91.4 75 15.5 2:00 3:15 -75
2024 Cutter 98 89.1 38 7.1 10:00 9:15 45
2024 4-Seam Fastball 12 94.8 72 12.3 12:45 12:30 15
2024 Sinker 85 94.7 72 15.9 1:15 2:30 -75
2024 Sweeper 76 83.8 57 14.6 8:45 9:15 -30
! Note: Years are in reverse order.
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! Note: This table is showing data from the PITCHER perspective.
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Pitcher Arm Angle

! Note: Data is available from 2020 through the present.
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Statcast Pitching Run Value

Runs
Year Team PA Pitches Heart Shadow Chase Waste All
2023 107 455 0 1 -6 -2 -8
2024 83 312 -1 2 -2 -1 -3
2025 10 40 -1 0 0 0 -1
Player 200 807 -3 3 -8 -3 -12
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Plate Discipline

Season Pitches Zone % Zone Swing % Zone Contact % Chase % Chase Contact % Edge % 1st Pitch Strike % Swing % Whiff % Meatball % Meatball Swing %
2023 455 44.2 69.7 85.0 19.3 53.1 44.0 50.5 41.5 23.3 7.3 90.9
2024 312 44.7 58.6 84.1 29.5 60.8 43.1 66.3 42.6 24.8 6.1 63.2
2025 40 60.0 66.7 93.8 25.0 75.0 47.5 60.0 50.0 10.0 7.5 66.7
Player 807 45.2 65.2 85.3 23.5 57.7 43.8 57.5 42.4 23.1 6.8 80.0
MLB 48.9 67.0 82.5 28.4 58.0 42.7 61.1 47.3 25.0 7.3 76.3
! Note: All figures in this table cover the period 2015-present.

Percentile Rankings

Year xwOBA /
xERA
xBA xSLG xISO xOBP Brl Brl% EV Hard
Hit%
K% BB% Whiff% Chase
Rate
FB
Velo
FB
Spin
CB
Spin
Extension
2023 71 80 49
2024 61 55 51
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Expected Home Runs

Adjusted

Year Team Avg HR Trot Actual HR xHR HR-xHR Doubters Mostly Gone No Doubters No Doubter %
2023 23.69 3 3.4 0 2 2 2 66.7
2024 23.46 3 2.9 0 1 2 1 33.3
Player 23.58 6 6.3 0 3 4 3 50.0
Note: xHR tells how many of this pitcher's batted balls allowed would have been out of other stadiums. The "Adjusted" view here accounts for different wall heights, distances and environmental effects using Statcast Park Factor data.
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Expected Home Runs by Park

Adjusted

Year HR
2023 3 4 2 3 3 3 3 4 3 3 3 5 4 3 4 3 4 4 3 3 4 3 4 3 3 3 3 4 4 3 3
2024 3 2 3 4 3 3 3 3 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 2
Player 6 6 5 7 6 6 6 7 5 6 6 8 7 6 7 6 7 7 6 6 7 6 7 6 6 6 6 7 7 6 5
Note: xHR tells how many of this pitcher's batted balls allowed would have been out of other stadiums. The "Adjusted" view here accounts for different wall heights, distances and environmental effects using Statcast Park Factor data.
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Year to Year Changes

2025 +/-   2024 +/-   2023
Results
BA .400 +.153 .247 -.086 .333
xBA .369 +.137 .232 -.069 .301
OBP .400 +.075 .325 -.109 .434
xOBP .369 +.054 .315 -.093 .408
SLG .500 +.062 .438 -.084 .522
xSLG .512 +.136 .376 -.115 .491
ISO .100 -.092 .192 +.003 .189
xISO .143 -.001 .144 -.046 .190
BABIP .444 +.166 .278 -.137 .415
wOBA .390 +.060 .330 -.084 .414
xwOBA .381 +.075 .306 -.085 .391
wOBACON .433 +.061 .372 -.109 .481
xwOBACON .423 +.086 .337 -.110 .447
BACON .444 +.128 .316 -.125 .441
xBACON .410 +.109 .301 -.099 .400
Statcast Hit Metrics
Hard Hit % 44.4 +9.3 35.1 -8.4 43.5
Avg Exit Velocity 91.3 +4.3 87.0 -5.6 92.6
Launch Angle Sweet-Spot % 33.3 0.0 33.3 -8.7 42.0
Barrel % 11.1 +4.1 7.0 -3.1 10.1
Avg Launch Angle 12.7 -2.4 15.1 +6.3 8.8
Statcast Bat Tracking
Bat Speed 72.1 +0.3 71.8 +2.1 69.7
Attack Angle 11° +3° +2°
Ideal Attack Angle % 53.8 -1.8 55.6 +2.7 52.9
Attack Direction +4° -3°
Swing Path - Tilt 33° -1° 34° +2° 33°
Swing Length 7.3 0.0 7.3 +0.2 7.1
Statcast Pitch Metrics
Fastball Velocity 93.4 +1.5 91.9 -3.3 95.2
Breaking Velocity 82.9 -0.8 83.7 +0.1 83.6
Offspeed Velocity 0.0 -- 91.5 -0.2 91.7
Batted Ball Results
Barrels 1 -3 4 -3 7
Popup % 11.1 -4.7 15.8 +14.4 1.4
Flyball % 11.1 -10.0 21.1 -0.6 21.7
Line Drive % 44.4 +23.3 21.1 -16.6 37.7
Groundball % 33.3 -8.8 42.1 +3.0 39.1
Pull % 22.2 -14.6 36.8 -3.8 40.6
Straight Away % 44.4 +9.3 35.1 -4.0 39.1
Opposite Field % 33.3 +5.2 28.1 +7.8 20.3
Weak Contact % 0.0 -3.5 3.5 +0.6 2.9
Pull Airball % 11.1 -13.5 24.6 +2.9 21.7
Topped Contact % 22.2 -11.1 33.3 +4.3 29.0
Under Contact % 33.3 +3.5 29.8 +15.3 14.5
Flare/Burner Contact % 33.3 +14.0 19.3 -16.9 36.2
Solid Contact % 0.0 -7.0 7.0 +1.2 5.8
HR/FB % 0.0 -25.0 25.0 +5.0 20.0
Popups 1 -8 9 +8 1
Flyballs 1 -11 12 -3 15
Line Drives 4 -8 12 -14 26
Groundballs 3 -21 24 -3 27
Plate Discipline
In Zone % 60.0 +15.3 44.7 +0.5 44.2
Out of Zone % 40.0 -15.3 55.3 -0.5 55.8
Edge % 47.5 +4.4 43.1 -0.9 44.0
Zone Swing % 66.7 +8.1 58.6 -11.1 69.7
Out of Zone Swing % 25.0 -4.5 29.5 +10.2 19.3
In Zone Contact % 93.8 +9.7 84.1 -0.9 85.0
Out of Zone Contact % 75.0 +14.2 60.8 +7.7 53.1
Whiff % 10.0 -14.8 24.8 +1.5 23.3
First Strike % 60.0 -6.3 66.3 +15.8 50.5
First Pitch Swing % 40.0 +8.7 31.3 +11.7 19.6
Swing % 50.0 +7.4 42.6 +1.1 41.5
Meatball Swing % 66.7 +3.5 63.2 -27.7 90.9
Meatball % 7.5 +1.4 6.1 -1.2 7.3
Zone Swing & Miss % 6.3 -9.6 15.9 +0.9 15.0
Out of Zone Swing & Miss % 25.0 -14.2 39.2 -7.7 46.9
In Zone 24 -116 140 -61 201
Out of Zone 16 -157 173 -81 254
Edge 19 -116 135 -65 200
In Zone Swings 16 -66 82 -58 140
Out of Zone Swings 4 -47 51 +2 49
In Zone Swing & Misses 1 -12 13 -8 21
Out of Zone Swing & Misses 1 -19 20 -3 23
Basic
Pitches 40 -272 312 -143 455
PA 10 -73 83 -24 107
AB 10 -63 73 -17 90
Hits 4 -14 18 -12 30
Singles 3 -8 11 -8 19
Doubles 1 -2 3 -5 8
Triples 0 -1 1 +1 0
Home Runs 0 -3 3 0 3
Walks 0 -9 9 -6 15
Strikeouts 1 -16 17 -5 22
K% 10.0 -10.5 20.5 -0.1 20.6
BB% 0.0 -10.8 10.8 -3.2 14.0
HBP 0 0 0 -1 1
Batted Balls 9 -48 57 -12 69
Number of Fastballs 25 -173 198 -51 249
Number of Offspeed 0 -37 37 -38 75
Number of Breaking 0 0 0 0 0
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Statcast Fielder Positioning

vs RHHvs LHH
YearAlignment TypePAwOBAPATotal%PATotal%
2023 Shades 107 .414 61 7 11.5 46 28 60.9
2024 Shades 83 .330 43 4 9.3 40 28 70.0
2025 Shades 10 .390 7 0 0.0 3 3 100.0
! Note: Shifts are through the 2022 season, Shaded starting from the 2023 season, Shift: three or more infielders are on the same side of second base, Shade: positioned outside of their typical responsible slices of the field.
Learn more about how positioning is defined here

Pitch Tempo

Bases EmptyRunners On Base
SeasonTeamPitchesTempoFast %Slow %PitchesTempoFast %Slow %
2023 110 13.7 70.0% 0.0% 111 16.6 25.2% 0.9%
2024 85 15.6 37.6% 0.0% 62 18.2 6.5% 3.2%
2025 6 16.4 33.3% 0.0% 14 18.7 0.0% 0.0%

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Pitch Distribution